Automatic stop for sound-reproducing machines.



R. 0. MAY.

AUTOMATIC STOP FOR SOUND REPRODUCINAG MACHINES.

APPLICATION FILED FEB. 23| 19|6.

Patented. Dec. 5, 1916.

3 SHEETS*SHEET l.

IIII

R. O. IVIAY.

AUTOMATIC STOP FOR SOUND REPRODUCING MACHINES.

APPLICATION FILED FEB. 23, 1916.

Patented Dec. 5, 1916.

LQU'KQ..

3 SHEETSvSHEET 2v nu 1m nto@ R. 0. MAY.

AUTOMATIC sToP FOR SOUND-,REPRODUCING MACHINES.

APPLICATION FILED FEB. 23. 1916.

Pmnfd Dee. 5,1916.

3 SHEETS-SHEET 3.

invento/o RALPH OLIVER, M AY, 01E* SALEM, XNJDIAN..

A'UTATJIC STOP FOR SOUND-REPROID'UCING MACHlIlSI'ES.V

Lacasse.

Specification of Letters Patent.

rate-neen nee. a, mic.

Application led February 23, 1916.- "Serial No. 79,979.

To all whom t may concern.'

Be it known that 1, RALPH 0. MAY, a citi- Zen of the United States, residing at Salem, in the county of Washington and State of llndiana, have invented new and useful lfmprovements in Automatic Stops for Soundlteproducing Machines, of which the following is a specication.

This invention relates to Vimprovements in automatic stop devices for sound reproducing machines and has particular application to an automatic stop for use in connection' with the talking machines of the disk type.

1n carrying out the present invention, it is my purpose to provide an automatic stop for disk talking machines whereby the reproducer will be lifted to disengage the needle from the record and the motor stopped at the end of the selection being played on the machine.

lit is' also my purpose to provide a device of the class described which will be carried by the goose neck on the tone arm and which will follow the needle and reproducer across the record when a selection is being-played and which will be so constructed as to support itself upon the record when following the needle and reproducer.

Another object of my invention is to provide an automatic stop of the type set forth, which will be constructed in such manner as to reduce the friction between the stop device and the record, when'the use, to a minimum so that the record may rotate at its usual speed and without placing additional strain on the motor of the talking machine. i

With the above and other objects in View, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and falling within the scope of the claims.

In the accompanying drawings; Figure 1 is a fragmentary side elevation of a talking machine equipped with an automatic stop constructed in accordance with the present invention. Fig. 2 is a fragmentary cross sectional view therethrough showing` the stop device in front elevation. Fig. 3 is an enlarged side elevation of the stop device, the record of the talking machine being shown i in section. Fig. l is a longitudinal sectional view through the device showing the parts in ducer.

the position they occupy when the device is traveling across the record wlth the repro- Fig. 5 is a cross sectional view device is in through the stop device on the line 5 5 of Fig. 3. Fig. 6 is a horizontal sectional view on the line 6 6 of Fig. 3. Fig. 7 is a plan vlew of the record controlled member. Fig. 8 is asimilar view of the button carried by the record. Fig. 9'is a cross sectional view on the line 9-9 of Fig. 3. Fig. 10 is a sectional view taken at right angles to Fig. 9

4showing a portion of the device in elevation.

Referring now to the drawings in detail, 1 designates the turn table of a talking machine, 2 a record on such table and 3 the tone arm to which is pivotally connected the usual goose neck l carrying the reproducer 5 equipped with a needle 6 engaging in the sound groovesin the record so that the selection may be reproduced.

y improved safety, device is indicated as an entirety by the letter A and, in the present instance, comprises astud 7 adapted to be threaded into one end of the goose neck in lieu of the usual set screw. Formed on the outer end of the stud 7 is a fiat head 8 and formed centrally of the head 8 and the stud is a recess 9. l

10 designates a casing comprising a curved top wall 11 and segmental side walls 12 depending from the side edges of the curved thereof is formed with an outwardly projecting arm 13 and formed on the cuter end of the arm 13 is a disk 15. This disk 15 is placed face to face with the head 8 on the stud 7, while formed in thev center of the disk l5 is an opening 16 in which is mounted a relatively thick bushing 17. Arranged face to face with the other face of the disk 15 is a plate 18 and formed in the plate 18 is an opening 19 registering with the opening in the bushing 17 and the recess 9 and passed through the opening 19 and the bushing and threaded into the recess is a securing stud 2O whereby the plate 18 may be clamped against the bushing and the bushing forced against the head 8. Owing tothe bushing being relatively thick as compared with the disk 15, the latter may rotate freely between the head 8 and the plate 18. Formed in the disk 15 at 'a point ybelow the arm 13 is a curved slotI 21, while secured to the inner face of the plate 18 and projecting into the slot 21 is a rotated about the securing stud 20 and the cushion engaged with the pin 22.

Mounted within the casing 10 and disposed between the side walls 12 thereof is a cam 24 and overlying the edge of the cam contiguous to the lower edges of the walls 12 is a pad 25 fastened to the cam by means of screws 26 or other suitable fastening devices and adapted to engage the upper surface of the record. ln the present instance, the edges of the cam contiguous to the top edges of the walls 12 are open and passed through alining openings formed in the walls 12 and the sides of the cam adjacent to the upper portion of the cam is a shaft 27 having the portion thereof within the cam formed with a crank 28 and the end portion adjacent to` the center of the turn table ofset as at 29 and then projected downwardly as at 30 toward the turn table, then outwardly as at 31 toward the center of the turn table and downwardly as at 32. rlhis downwardly projecting portion 32 constitutes a trip arm and terminates contig-l nous to the upper surface of the record on the turn table. Extending across the interior of the' cam at a point adjacent to the shaft 27 and disposed in the path of movenient of the crank portionv28 is a shaft 33 and fastened to the pin 33 is one end of a coiled retractile spring 34, the other end of such spring being fastened to the curved wall 11 of the casing 10. Fast upon the side wall 12 of the casing facing the center vof the turn table is a partially circular housing 35 and rotatably mounted in this housing 35 is a bearing wheel 36 having the periph'.

ery thereof covered with felt or'other soft material and projecting below the side wall of the casing and adapted to ride over the record as the selection thereon is being played. Suitably secured to the playing surface of the record adjacent to the center thereof is a button 37.`

1n practice, the spring 34 holds the cam 24 normally within the confines of the walls of the casing and when a selection is to be played the needle is placed in the sound groove in the usual manner" and the periphery of the roller 36 engaged with the record outside of the needle. 1n the playing of the selection, the needle traverses the sound grcoveand the stopping device follows the needle and the reproducer owing to the connection between the stopping device and the geese neck. When the needle reaches the last sound groove succeeding the playing of the selection, the trip arm 32 engages the button 37 and in the continued rotation of the record the, shaft 27 is rocked, thereby engaging the crank portion with the pin 33 andl swinging theouter edge of the cam into engagement with the record against the action of the' spring 3a. Als the record continues to revolve the cam; is drawn out of neef/,eee

the casing and in the outward movement of the cam the casing and arm 13 are elevated,

thereby rotating the disk 15. Upon the ro' l tation of the disk 15 the cushion 23 engages the pin 22 in the plate 18 with the effect to rotate the goose neck to elevate the repro- Abetween the disk 15 and the goose .ueckthe frame carrying the camza'nd associated parts' may adjust itself, to needles ofvarious lengths. i

While I have herein shown and described the preferred form of my invention by way of illustration, ll wish it to be understood that l do not limit or confine myself to the precise details of construction herein described and delineated, as modification and variation may be made within the scope of the claims and without departing from the spirit of the invention.

I claim: s

1. 1n an automatic stop for sound reproducing machines of the disk type, the combination with the goose neck of the tone arm, of a frame, a loose connection between said frame and the goose neck whereby the frame may adapt itself to needles of various lengths, means supporting said frame upon the record, a cam carried by said frame and normally out of engagement with the record,

and record controlled means for swinging said cam downwardly into engagement with the record whereby the cam will be acted upon to elevate said frame and goose neck and bear upon the. record to lift the needle out of engagement with the record and stop the rotation of the record.

2. In an automatic stop for sound reproducing machines of the disk type, the combination with the goose neck of the tone arm, of a frame, a loose connection between said frame and the goose neck whereby the frame may adapt itself to needles of various lengths, means supporting said frame upon the record, a cam carried by said frame and normally out of engagement with the record, record controlled means forv swinging said cam downwardly into engagement with the record whereby the cam will be acted upon to elevate said frame and goose neck and bear upon the record to lift the needle out of engagement with the record and stop the rotation of the record, and a spring holding said cam normally in said frame. A

3. ln an automatic stop for sound rcproducing machines, the combination with the goose neck of the tone arm, of a frame, a loose connection between said framey and the goose neck whereby the frame may adapt itself to needles of various lengths, means carried by said frame and normally out of engagement with the record7 and capable of movement to engage the record to stop the rotation of the latter and elevate said frame,

l0 and means for actuating said means into engagement with the record whereby said first means will act to elevate said frame and goose neck and bear upon the record to elevate the needle out of engagement with the record and stop the rotation of the record.

In testimony whereof I aHiX my signature in presence of two witnesses.

RALPH OLIVER MAY.

`Witnesses:

WILLIAM OVERMAN, JAMES W.y MAY. 

